Process of deodorizing kerosene



Patented May 19, 19:25.

UNITED STATES,

PATENT... OFFlCE.

WOLF KRI'ICHEVSKY AND HAROLD C. PRUTSMAN, OF CHICAGO, ILLINOIS, ASSIGNOBS,

T0 WILLIAM CITRON, TRUSTEE, OF CHICAGO, ILLINOIS.

No Drawing.

To all whom it may concern:

Be it known that we, VVoLF Knrromn'sm' and HAao D C. PRUTSMAN, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Processes of Deodorizing (erosene, of which the following is. a specitication.

This application is a continuation in part of our application, Serial No 615,37 3, filed Jan. 27, 1923. i y 7 One of the objects of our invention is to so treat commercial kerosene or other light hydrocarbon-as to eliminate the characteristic odor thereof, whatever -'odor remaining being unobjectionable. Such a product'is highly useful for many purposes, ,for which the hydrocarbon in its original state is objectionable. Y

Another ob'ect is to produce the product as described y means of a process which .may be economically carried out. By the use of our process the volume of chemicals employed or securing the desired result is materially reduced overthat required in any of the known processes. a 1

According to our invention we effect the desired result by simultaneously oxidizing and sulphonating the hydrocarbon by the use of chlorsulphonic acid, then purifying I with a concentrated alkali, then finally treating with a colloidal substance. y In the practice of the invention we first treat the kerosene or other hydrocarbonwith onic acidr As a result of the chemical approximately 1% by volume of chlorsulreaction the temperature is raised "and then lowered and a sludge settles which is drawn off and the operation preferably repeated, depending upon the impurities in the kero-' sene. Thereafter the product iswashedwith water and then with a strong alkali such as sodium hydroxide. It is then washed' and the hydrocarbon is stirred for several hours with a colloidal substance such as Application ma m 2, may Serial in. 723,649.

fullers earth, Kieselguhr or charcoal, etc. a

Following the subsequent filtering the material is free from objectionablecharacteristic odors of the hydrocarbon;

Instead of chlorsulphonic acid, we ma employ reagents which form 'that acid suc i as a mixture of fuming sulphuric acid and sodium chloride. 1

The quantity of chemicals employed is relatively small" and the process may be carried out at a reasonably low cost compared to the cost of processes heretofore known. While we have specified a definite proportion-0f acid we do not wish to be limited exactly to that proportion as variations may be made without destroying the beneficial results.

The amount usedwdepends upon the quan- -tity of aromatic hydrocarbons and sulphur derivatives in the aliphatic hydrocarbons. .We claim:

1. The method of deodorizing kerosene which consists in treating the same with chlorsulphonic acid, then washing, then treating with an alkali, and thentreating with a solid absorbent colloid.

2. The method of deodorizing kerosene which consists in treating the same with.

which consists in treating the same with' substantially 1% by volume of chlorsuL. phonic acid, then removing the sludge and repeating the operation with alike amount of chlorsulphonic acid, then treating with an alkali, and then with a solid absorbent colloid." I

Signed atChicago, J une, 1924."

WOLF KRITCH'EVSKY. HAROLD o. PRUTSMAN.

111., this 16th day of 

